Edition 30 GTI developed new throaty sound over 40 mph

[RID]

I have an Ediiton 30 GTI with 76,000 miles which has recently developed a throaty sound when I go over 40 mph.  Kwikfit checked the exhaust and that's fine - has anyone come across anything similar?

Thanks in advance

[alexperkins]

Can you pinpoint where the sound is coming from? ie exhaust or wheels?

[RID]

It sounds like it's coming from under the car as opposed to the engine but not sure it's the wheels - Kwikfit couldn't see any holes in the exhaut when they jacked it up

[alexperkins]

Could be a wheel bearing perhaps

If its speed related, it cant be too many things

[RID]

Thanks Alex - is that expensive to fix on these cars?

[alexperkins]

Not too bad. About £30 for the part then labour on top

Would be worth taking it to a decent VW specialist and get them to have a listen

[rich83]

Is it at 40mph only? Or 40 and above?

[RID]

About 40 mph and above

[Saint Steve]

What sort of miles has it done? does it feel down on power? feels abit flat?

[RID]

76, 000 miles - seems to drive ok though

[Saint Steve]

Might be worth looking at your Diverter valve? as its done over 70+K miles

If your mpg seems to be getting worse, then might be worth having a look.

Did kwik fit just tap the outside of the exhaust and check for signs of leaks, or did they use a endiscope to check the condition of the baffles inside the Back box?

[Five Alive]

yeah could be the baffles gone, my girlfriends little polo gti sounds well throaty but exhaust looks fine

[RID]

I guess Kwikfit only  did a superficial check.  Thanks to everyone for the input - much appreciated

[PDT]

Did kwik fit just tap the outside of the exhaust and check for signs of leaks, or did they use a endiscope to check the condition of the baffles inside the Back box?

That made me chuckle, a lot. Kwik fit can rarely use a tyre machine properly, endoscope to check the baffles? The most complex tool in the workshop is probably the handle to flush the toilet.

[golfecho5]

Wouldn't trust quick-dick for anything other than a cheap MOT. Most exhausts develop a throatier sound as they get older as the packing in the exhaust gets older and more compressed with sh*t but if you've had a sudden change in sound then you need to get someone who really knows their stuff to look at both manifolds and the turbo plumbing to make sure there's not a leak.

A tiny hole somewhere in the induction can cause a pretty good roar under torque but will reduce when top end power introduces itself to the engine, I'd say worth getting a spray bottle of soapy water and spraying around the turbo/induction tracts and getting a friend to hit the pedal hard for a second to get the turbo spooling/gain boost and see if you get any blow out.

If you're not confident doing this and you need to be careful where you spray then get a specialist to look, I suspect your problem is induction not exhaust taking into account how you suddenly heard the noise.

Good luck but if in doubt get a real expert who cares to look not Qwick- Tang. Most of them don't know there arse from their elbow.
Disclaimer: I'm sure that this comment does not apply to all who work at KrapQwick and there will be the exception to the rule.